Stationary NiCd battery sizing

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Date : 06/01/2011

Battery proposalProposed battery 1 x 96 x MC110P

Electrical data Rated capacity 110 AhFast charge voltage 139.20 VFloating charge voltage 134.40 VFinal voltage/cell 1.000 VShort-circuit current 1862 ATopping-up interval 4.0 Years

Physical data Battery weight 693.1 kg

Technical specificationsSizing method IEEE I

Voltage window Minimum system voltage 96.00 VMaximum system voltage 140.00 VNominal system voltage 125.00 V

Charge method Dual rate

Load profile Current / Power Time(hh:mm:ss)1 40.00 A 0:59:002 140.00 A 0:01:00

Options Nominal temperature 20 °CMinimum temperature 5 °CMaximum temperature 40 °CDesign margin 1Aging factor 1

Stationary NiCd battery sizingLoad profile

Visit our website alcad.com V4.4 06/07This document becomes contractual only after written confirmation

Date : 06/01/2011

Amperes

00mn 10mn 20mn 30mn 40mn 50mn 60mn0

20

40

60

80

100

120

140

Battery calculation worksheetIEEE 1115

Visit our website alcad.com V4.4 06/07This document becomes contractual only after written confirmation

Date : 06/01/2011

: MC : 96 : 1.000 V : 20.0°C : 5.0°C : 40.0°C

RangeNo. of cellsFinal voltage/cellNominal temperatureMinimum temperatureMaximum temperature

(1)Period

(2)Load

(Amperes)

(3)Changes

inLoad

(Amperes)

(4)Duration

ofPeriod

(minutes)

(5)Endof

Section(minutes)

(6)Kt

Factor *

(7)Temp

DeratingFactor

(8)RequiredSection

Size(3)x(6)x(7)=Rated Ah

Section 1 - First 1 Periods Only - If A2 > A1, go to Section 2 - Yes

Section 2 - First 2 Periods Only - If A3 > A2, go to Section 3 - No

1 A1=40.00 A1-0=40.00 M1=59.00 t=M1+M2=60.00 1.34 1.13 60.26

2 A2=140.00 A2-A1=100.00 M2=1.00 t=M2=1.00 0.37 1.23 45.91

Total 106.17

Random Equipment Load Only (if needed)

R AR= AR-0= MR= t=MR= 0.00(*) In this calculation, constant potential charging effects are included in our Kt factors

Maximum Section Size 106.17 + Random Size 0.00 = Uncorrected Size 106.17Uncorrected Size 106.17 x Design Margin 1.00 x Aging Factor 1.00 = 106.17When the cell size is greater than a standard cell size, the next larger cell is required.The required cell size is 106.17 Amperes-hours. Therefore cell MC110P is required